source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/CustomDPT.inc @ 400

Last change on this file since 400 was 400, checked in by aitotat@…, 12 years ago

Changes to XTIDE Universal BIOS:

  • Moved 8-bit device support to MODULE_8BIT_IDE.
  • JR-IDE/ISA support requires a lot less bytes.
  • AT builds now always use full operating mode.
File size: 5.4 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Defines for DPT structs containing custom
3;                   Disk Parameter Table used by this BIOS.
4
5;
6; XTIDE Universal BIOS and Associated Tools
7; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
8;
9; This program is free software; you can redistribute it and/or modify
10; it under the terms of the GNU General Public License as published by
11; the Free Software Foundation; either version 2 of the License, or
12; (at your option) any later version.
13;
14; This program is distributed in the hope that it will be useful,
15; but WITHOUT ANY WARRANTY; without even the implied warranty of
16; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17; GNU General Public License for more details.
18; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
19;
20
21%ifndef CUSTOMDPT_INC
22%define CUSTOMDPT_INC
23
24; Base DPT for all device types
25struc DPT   ; 10 bytes
26    ; General Disk Parameter Table related
27    .wFlags:
28    .bFlagsLow              resb    1
29    .bFlagsHigh             resb    1
30    .bIdevarsOffset         resb    1   ; Offset to IDEVARS for this drive
31
32    ; IDE Drive related
33    ; .bLbaHeads and .twLbaSectors are used for LBA addressing only.
34    .bLbaHeads:             resb    1   ; Number of LBA assisted heads (1...255)
35    .twLbaSectors           resb    2   ; 48-bit sector count for LBA addressing
36
37    ; .wPchsCylinders and .bPchsSectors are used for CHS addressing only.
38    .wPchsCylinders         resb    2   ; Number of P-CHS Cylinders (1...16383)
39    .wPchsHeadsAndSectors:
40    .bPchsHeads             resb    1   ; Number of P-CHS heads (1...16)
41    .bPchsSectors           resb    1   ; Number of P-CHS Sectors per Track (1...63)
42endstruc
43
44    ; Bit definitions for DPT.bFlagsLow
45    MASKL_DPT_CHS_SHIFT_COUNT                   EQU (7<<0)  ; Bits 0...2, P-CHS to L-CHS bit shift count (0...4)
46    FLGL_DPT_SLAVE                              EQU FLG_DRVNHEAD_DRV    ; (1<<4), Drive is slave drive
47    MASKL_DPT_ADDRESSING_MODE                   EQU (3<<5)  ; Bits 5..6, Addressing Mode (bit 6 == FLG_DRVNHEAD_LBA)
48    FLGL_DPT_ENABLE_IRQ                         EQU (1<<7)
49
50    ; Bit definitions for DPT.bFlagsHigh
51    FLGH_DPT_BLOCK_MODE_SUPPORTED               EQU (1<<1)  ; Use block transfer commands (must be bit 1!)
52    FLGH_DPT_SERIAL_DEVICE                      EQU (1<<2)  ; Serial Port Device
53    FLGH_DPT_INTERRUPT_IN_SERVICE               EQU (1<<3)  ; Set when waiting for IRQ
54    FLGH_DPT_POWER_MANAGEMENT_SUPPORTED         EQU (1<<5)
55
56    ; IDE device only
57    FLGH_DPT_IORDY                              EQU (1<<7)  ; Controller and Drive supports IORDY
58
59    ; Serial device only
60    FLGH_DPT_SERIAL_FLOPPY                      EQU (1<<4)
61    FLGH_DPT_SERIAL_FLOPPY_TYPE_MASK            EQU 0e0h
62    FLGH_DPT_SERIAL_FLOPPY_TYPE_FIELD_POSITION  EQU 5
63
64    ; Addressing modes for DPT.wFlags
65    ADDRESSING_MODE_FIELD_POSITION              EQU     5
66    ADDRESSING_MODE_LCHS                        EQU     0   ; L-CHS Addressing Mode (NORMAL in many other BIOSes)
67    ADDRESSING_MODE_PCHS                        EQU     1   ; P-CHS Addressing Mode (LARGE in many other BIOSes)
68    ADDRESSING_MODE_LBA28                       EQU     2   ; 28-bit LBA Addressing Mode
69    ADDRESSING_MODE_LBA48                       EQU     3   ; 48-bit LBA Addressing Mode
70
71
72; DPT for ATA devices
73struc DPT_ATA   ; 10 + 2 bytes = 12 bytes
74    .dpt                    resb    DPT_size
75    .bBlockSize             resb    1   ; Current block size in sectors (do not set to zero!)
76    .bDevice                resb    1   ; Device Type from IDEVARS (overrided when 32-bit controller detected)
77endstruc
78
79
80; Additional variables needed to initialize and reset Advanced IDE Controllers.
81; EBDA must be reserved for DPTs when using these!
82%ifdef MODULE_ADVANCED_ATA
83struc DPT_ADVANCED_ATA
84    .dpt_ata                resb    DPT_ATA_size
85    .wControllerID          resb    2   ; Controller specific ID WORD (from Advanced Controller detection)
86    .wControllerBasePort    resb    2   ; Advanced Controller port (not IDE port)
87    .wMinPioCycleTime       resb    2   ; Minimum PIO Cycle Time in ns
88    .bPioMode               resb    1   ; Best supported PIO mode
89    .bInitError             resb    1   ; Flags for initialization errors
90endstruc
91%endif
92
93    ; Flags for DPT_ADVANCED_ATA.bInitError
94    FLG_INITERROR_FAILED_TO_SELECT_DRIVE                EQU (1<<0)
95    FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS   EQU (1<<1)
96    FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE             EQU (1<<2)
97    FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE           EQU (1<<3)
98    FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE              EQU (1<<4)
99    FLG_INITERROR_FAILED_TO_SET_PIO_MODE                EQU (1<<5)
100    FLG_INITERROR_FAILED_TO_INITIALIZE_STANDBY_TIMER    EQU (1<<6)
101
102
103; DPT for Serial devices
104%ifdef MODULE_SERIAL
105struc DPT_SERIAL
106    .dpt                    resb    DPT_size
107    .wSerialPortAndBaud:
108    .bSerialPort            resb    1   ; Serial connection I/O port address, divided by 4
109    .bSerialBaud            resb    1   ; Serial connection baud rate divisor
110endstruc
111%endif
112
113
114; This is the common size for all DPTs. All DPTs must be equal size.
115%ifdef MODULE_ADVANCED_ATA
116    LARGEST_DPT_SIZE            EQU     DPT_ADVANCED_ATA_size
117%else
118    LARGEST_DPT_SIZE            EQU     DPT_ATA_size
119%endif
120
121
122    ; Number of Sectors per Track is fixed to 63 for LBA assist calculation.
123    ; 1024 cylinders, 256 heads, 63 sectors = 8.4 GB limit (but DOS does not support more than 255 heads)
124    MAX_LCHS_CYLINDERS          EQU     1024
125    LBA_ASSIST_SPT              EQU     63
126
127
128;--------------------------------------------------------------------
129; LIMIT_LBA_CYLINDERS_IN_DXAX_TO_LCHS_CYLINDERS
130;   Parameters:
131;       DX:AX:  Number of LBA cylinders
132;   Returns:
133;       AX:     Number of L-CHS cylinders
134;   Corrupts registers:
135;       Nothing
136;--------------------------------------------------------------------
137%macro LIMIT_LBA_CYLINDERS_IN_DXAX_TO_LCHS_CYLINDERS 0
138    test    dx, dx
139    jnz     SHORT %%LoadMaxValueToAX
140    cmp     ax, MAX_LCHS_CYLINDERS
141    jb      SHORT %%NoNeedToModify
142%%LoadMaxValueToAX:
143    mov     ax, MAX_LCHS_CYLINDERS
144%%NoNeedToModify:
145%endmacro
146
147
148%endif ; CUSTOMDPT_INC
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